Electromagnetic clutch combination structure with novel connection mode

Abstract

The utility model discloses an electromagnetic clutch combination structure with a novel connection mode. The electromagnetic clutch combination structure comprises a jaw disc arranged on an input shaft in a sleeving mode and a plurality of transmission pieces used for transmitting torque between the input shaft and the jaw disc. A plurality of first grooves are formed in the peripheral surface of the input shaft at intervals in the circumferential direction; a plurality of second grooves suitable for being matched with the first grooves are formed in the inner circumferential face of the tooth embedding disc in the circumferential direction at intervals. Each first groove is matched with the corresponding second groove to form a mounting groove suitable for mounting a transmission part; the radial inner side of the transmission part is located in the first groove, so that the transmission part is in transmission fit with the input shaft, and the transmission part and the first groove form line contact or multi-point contact. The radial outer side of the transmission part is located in the second groove, so that the transmission part is in transmission fit with the jaw disc, and the transmission part and the second groove form line contact or multi-point contact. According to the electromagnetic clutch, the technical problems of tooth knocking at the connecting structure in the electromagnetic clutch and high operation noise are solved, and the technical effect of reducing the tooth knocking noise at the connecting structure of the electromagnetic clutch is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic clutches, and particularly to an electromagnetic clutch combination structure with a novel connection method. Background Art

[0002] During the period of the rapid development of new energy vehicles, electromagnetic clutches emerged as the times require. The main function of an electromagnetic clutch is to transmit torque during rotation.

[0003] In the existing electromagnetic clutch, the connection structure between the spline disk and the input shaft is a petal tooth meshing connection. Petal teeth are provided on the input shaft, and petal tooth grooves are provided on the inner ring of the spline disk. In the axial direction of the input shaft, the spline disk can slide reciprocally on the petal teeth.

[0004] The operating mode of the existing electromagnetic clutch is usually that the speed and power of the engine are transmitted to the input shaft through a spline. During the operation of the electromagnetic clutch, the electromagnetic coil is energized to drive a push ring provided with a permanent magnet to push the spline disk, so that the spline disk meshes with a gear at the other end of the input shaft to complete the transmission of torque. After the electromagnetic coil is powered off, the spline disk resets under the restoring elastic force of the spring to interrupt the transmission of torque.

[0005] However, there is a knocking problem between the petal teeth and the petal tooth grooves in the existing petal tooth structure during torque transmission, which causes excessive noise during the operation of the electromagnetic clutch.

[0006] Therefore, it is necessary to design an electromagnetic clutch with low operating noise. Summary of the Utility Model

[0007] This application provides an electromagnetic clutch combination structure with a novel connection method, which is used to solve the technical problems of knocking teeth at the connection structure in the electromagnetic clutch and large operating noise.

[0008] An electromagnetic clutch combination structure with a novel connection method provided by this application includes: an input shaft, a spline disk sleeved on the input shaft, and a plurality of transmission parts for transmitting torque between the input shaft and the spline disk; a plurality of first grooves are circumferentially and spacedly arranged on the outer peripheral surface of the input shaft; a plurality of second grooves adapted to cooperate with the first grooves are circumferentially and spacedly arranged on the inner peripheral surface of the spline disk; each first groove and the corresponding second groove cooperate to form an installation groove suitable for installing the transmission part, and the transmission part is installed in the installation groove; the radially inner side of the transmission part is located in the first groove, so that the transmission part is in transmission cooperation with the input shaft, and the transmission part forms a line contact or a multi-point contact with the inner wall of the first groove; the radially outer side of the transmission part is located in the second groove, so that the transmission part is in transmission cooperation with the spline disk, and the transmission part forms a line contact or a multi-point contact with the inner wall of the second groove.

[0009] By adopting the above technical solution, a first groove is provided on the input shaft, a second groove is provided on the jaw plate, and the transmission member is installed on the installation groove formed by the cooperation of the first groove and the second groove, so that the transmission member forms a line contact or a multi-point contact with the first groove and the second groove, thereby optimizing and replacing the circumferential constraint form of the petal tooth surface contact in the prior art, reducing the contact area of the connection structure during torque transmission, and effectively reducing the noise generated at the connection structure.

[0010] Preferably, during the torque transmission process, the transmission member forms a line contact with both the first groove and the second groove, and both straight lines are parallel to the axis of the input shaft; or the transmission member forms a multi-point contact with both the first groove and the second groove, and all the contact points are located on two straight lines parallel to the axis of the input shaft.

[0011] By adopting the above technical solution, the two straight lines in line contact are parallel to the axis or multiple contact points are linearly distributed on two parallel straight lines, so that the force transmission path is evenly distributed along the axis, avoiding stress concentration caused by torque transmission and improving the stability of torque transmission.

[0012] Preferably, the transmission member is a pin shaft, the outer radial side of the pin shaft forms a line contact with the inner wall of the second groove, and the inner radial side of the pin shaft forms a line contact with the inner wall of the first groove.

[0013] By adopting the above technical solution, the transmission member uses a pin shaft. Through the line contact between the pin shaft and the first groove and the second groove, while reducing the contact area, it provides a stable circumferential constraint and improves the stability of torque transmission.

[0014] Preferably, both ends of the first groove are open, the second groove is provided through the jaw plate, the pin shaft is inserted and matched with the installation groove, and the input shaft or the jaw plate axially limits the pin shaft.

[0015] By adopting the above technical solution, the through openings of the first groove and the second groove realize the insertion and matching of the pin shaft, realizing the rapid assembly of the transmission member. The input shaft or the jaw plate axially limits the pin shaft to prevent the pin shaft from disengaging during operation and causing failures, improving the stability of operation.

[0016] Preferably, the transmission member is composed of a plurality of balls. The plurality of balls are arranged axially in the installation groove. The outer radial sides of the plurality of balls all form point contacts with the inner wall of the second groove, and the plurality of contact points on the second groove are all located on a straight line; the inner radial sides of the plurality of balls all form point contacts with the inner wall of the first groove, and the plurality of contact points on the first groove are all located on another straight line.

[0017] By adopting the above technical solution, the transmission member is composed of a plurality of balls. The plurality of balls are linearly arranged in the installation groove and form a double-row point contact with the first groove and the second groove. By the rolling characteristics of the balls, the sliding friction is converted into rolling friction, further reducing the sliding friction resistance, and the discrete distribution of the point contacts can disperse the load and further reduce the noise.

[0018] Preferably, both ends of the first groove are open, the second groove is disposed through the jaw plate, and a plurality of balls are arranged in sequence along the axial direction of the input shaft in the installation groove, and the input shaft or the jaw plate axially limits the plurality of balls.

[0019] By adopting the above technical solution, the through openings of the first groove and the second groove facilitate the assembly of the balls, improve the assembly efficiency, and axially limit the balls through the input shaft or the jaw plate, preventing the pin shaft from disengaging during operation and causing failures, and improving the stability of operation.

[0020] Preferably, both the first groove and the second groove extend along the axial direction of the input shaft, and in the radial direction, the cross-sections of both the first groove and the second groove are arc-shaped.

[0021] By adopting the above technical solution, the arc-shaped cross-section design of the first groove and the second groove enables the contact force between the transmission member and the groove wall to be always transmitted along the normal direction, avoiding edge stress concentration and improving the service life of the equipment.

[0022] Preferably, in the radial direction, the cross-sections of the first groove and the second groove are symmetrically arranged.

[0023] By adopting the above technical solution, the symmetrically arranged arc-shaped grooves ensure that the acting forces are symmetrically distributed relative to the transmission member during torque transmission, improving the running smoothness and the clutch response speed.

[0024] Preferably, the transmission member is axially movably engaged with the first groove and axially movably engaged with the second groove.

[0025] By adopting the above technical solution, the setting that the transmission member is movably engaged with the installation groove significantly reduces the sliding friction resistance during the operation of the jaw plate, improves the sensitivity of the clutch response, and effectively reduces the risk of jamming.

[0026] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0027] 1. By using point contact or line contact to replace the surface contact of the traditional petal teeth, the contact area at the connection structure during torque transmission is significantly reduced, effectively suppressing vibration and impact, fundamentally solving the problem of knocking teeth, and significantly reducing the noise during operation;

[0028] 2. The opening settings of the first groove and the second groove facilitate the assembly of the transmission member, improve the assembly efficiency, and axially limit the transmission member through the input shaft or the jaw plate, effectively preventing the transmission member from disengaging during operation, and ensuring the stability and safety of the structure under high-speed rotation;

[0029] 3. The arc-shaped cross-section design of the first groove and the second groove enables the contact force between the transmission part and the groove wall to be always transmitted in the normal direction, avoiding edge stress concentration, increasing the service life of the equipment. The symmetrically arranged arc-shaped grooves ensure that the acting forces are symmetrically distributed relative to the transmission part during torque transmission, improving the running stability and the clutch response speed.

[0030] 4. The setting of the transmission part being movably fitted with the installation groove significantly reduces the sliding friction resistance during the operation of the jaw plate, improves the sensitivity of the clutch response, and effectively reduces the risk of jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 An isometric view of the input shaft, jaw plate and transmission part of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0033] Figure 2 An exploded view of the input shaft, jaw plate and transmission part of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0034] Figure 3 A partial cross-sectional view of the transmission part as a pin shaft of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0035] Figure 4 A partial cross-sectional view of the transmission part as a ball and provided with a second circlip of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0036] Figure 5 A partial cross-sectional view of the transmission part as a ball and provided with a ball socket groove in the second groove of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0037] Figure 6 A partial cross-sectional view of the transmission part as a ball and the two ends of the second groove being closed of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0038] Figure 7 A partial cross-sectional view of the transmission part as a tapered pin of an electromagnetic clutch combination structure with a new connection method provided by the present application;

[0039] Figure 8Partial cross-sectional view showing the transmission member of an electromagnetic clutch engagement structure with a new connection method provided by this application in transmission cooperation with the first groove and the second groove.

[0040] Explanation of reference numerals: 1, input shaft; 11, first groove; 12, first oil guide groove; 13, first oil guide hole; 14, first snap ring; 15, oil storage cavity; 2, jaw plate; 21, second groove; 211, first limiting member; 212, ball socket groove; 22, second snap ring; 3, pin shaft; 4, ball; 5, permanent magnet ring; 6, inner ring; 7, bushing; 8, spring; 9, transmission member. Detailed implementation manners

[0041] This application provides an electromagnetic clutch engagement structure with a new connection method, which is used to solve the technical problems of knocking teeth at the connection structure in the existing electromagnetic clutch and large operating noise.

[0042] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0043] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0045] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0046] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" shall be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0047] An electromagnetic coil assembly, a jaw clutch disc 2, and a gear assembly are sequentially sleeved on the input shaft 1 of the electromagnetic clutch from left to right; the electromagnetic coil assembly includes a push ring sleeved on the input shaft 1, and the push ring is formed by sleeving an inner ring 6 and a permanent magnet ring 5 with an interference fit. The left end of the push ring abuts against the input shaft 1, and the right end of the push ring abuts against the left end of the jaw clutch disc 2; the gear assembly includes a bushing 7 sleeved on the input shaft 1, and a spring 8 is arranged between the bushing 7 and the jaw clutch disc 2, and the jaw clutch disc 2 abuts against the push ring under the action of the spring 8.

[0048] Embodiment 1

[0049] As Figures 1 to 3 shown, the embodiment of the present application provides an electromagnetic clutch combination structure with a novel connection method, including: an input shaft 1, a jaw clutch disc 2 sleeved on the input shaft 1, and a plurality of transmission members 9 for transmitting torque between the input shaft 1 and the jaw clutch disc 2; a plurality of first grooves 11 are circumferentially and spacedly arranged on the outer peripheral surface of the input shaft 1; a plurality of second grooves 21 adapted to cooperate with the first grooves 11 are circumferentially and spacedly arranged on the inner peripheral surface of the jaw clutch disc 2; each first groove 11 and the corresponding second groove 21 cooperate to form an installation groove suitable for installing the transmission member 9, and the transmission member 9 is installed in the installation groove; the radially inner side of the transmission member 9 is located in the first groove 11, so that the transmission member 9 is in transmission cooperation with the input shaft 1, and the transmission member 9 forms a line contact or a multi-point contact with the inner wall of the first groove 11; the radially outer side of the transmission member 9 is located in the second groove 21, so that the transmission member 9 is in transmission cooperation with the jaw clutch disc 2, and the transmission member 9 forms a line contact or a multi-point contact with the inner wall of the second groove 21.

[0050] Preferably, in the embodiment provided by the present application, three second grooves 21 are circumferentially and evenly arranged at the inner circle of the jaw clutch disc 2, and the axes of the three second grooves 21 penetrate through the jaw clutch disc 2. Three first grooves 11 are correspondingly arranged on the input shaft 1, and both ends of the three first grooves 11 are open. A first oil guide groove 12 is arranged at the bottom of each first groove 11, and the first oil guide groove 12 extends along the length direction of the first groove 11. A first oil guide hole 13 communicating with the oil storage cavity 15 of the input shaft 1 is arranged at the bottom of the first oil guide groove 12.

[0051] The transmission member 9 is a pin shaft 3, and a cylindrical pin with a cylindrical shape is adopted. The cross-sectional shapes of the first groove 11 and the second groove 21 are both semi-circular, and the cylindrical pin is in clearance fit with the installation groove.

[0052] During the torque transmission process, as Figure 8As shown in the figure, the rotation of the input shaft 1 drives the cylindrical pin. A line contact is formed between the first groove 11 and the cylindrical pin. The outer peripheral wall of the lower left of the cylindrical pin abuts against the first groove 11, and the contact line is parallel to the axial direction of the input shaft. The cylindrical pin further drives the jaw clutch disc 2 to rotate. A line contact is formed between the cylindrical pin and the second groove 21. The outer peripheral wall of the upper right of the cylindrical pin abuts against the second groove 21, and the contact line is parallel to the axial direction of the input shaft. Among them, the contact lines on the first groove 11 and the second groove 21 are symmetrically arranged with respect to the cylindrical pin, and torque is transmitted through line contact. Compared with the spline drive in the prior art, the contact area is smaller, and the generation of noise is fundamentally reduced.

[0053] When installing the jaw clutch disc 2, the jaw clutch disc 2 is sleeved on the input shaft 1 so that the three second grooves 21 and the three first grooves 11 correspond one by one. Then, the three cylindrical pins are inserted into the installation grooves formed by the cooperation of the first groove 11 and the second groove 21.

[0054] A snap ring installation groove is provided on the input shaft 1, and a first snap ring 14 is sleeved in the snap ring installation groove. The first snap ring 14 is arranged at the left end opening of the first groove 11. The left end of the cylindrical pin is limited by the first snap ring 14, and the right end of the cylindrical pin is limited by the shaft sleeve 7 to prevent the cylindrical pin from disengaging from the installation groove.

[0055] The length of the cylindrical pin is less than the length of the first groove 11 and greater than the length of the second groove 21. During the left and right sliding of the jaw clutch disc 2, the cylindrical pin can also slide axially along the input shaft 1 in the installation groove. The left end of the cylindrical pin is limited by the first snap ring 14, and the right end of the cylindrical pin is limited by the shaft sleeve 7.

[0056] In this embodiment, by providing a second groove 21 with a semicircular cross-section on the jaw clutch disc 2, providing a first groove 11 with a semicircular cross-section on the input shaft 1, and inserting and installing the cylindrical pin on the installation groove formed by the cooperation of the first groove 11 and the second groove 21, the circumferential constraint form of line contact between the cylindrical pin and the installation groove is used to replace the circumferential constraint form of petal tooth surface contact in the prior art, reducing the contact area of the connection structure during torque transmission, effectively reducing the noise generated at the connection structure, and the setting that the cylindrical pin can slide axially along the input shaft 1 in the installation groove reduces the sliding friction resistance and reduces the risk of jamming of the jaw clutch disc 2 during operation.

[0057] Embodiment 2

[0058] Further, on the basis of the above embodiment, as Figure 4 shown, slightly different is that the transmission member 9 is composed of two balls 4 arranged axially along the input shaft 1. The outer peripheral wall of the ball 4 is in clearance fit with the inner wall of the installation groove. The cross-section of each first groove 11 is semicircular, and both ends of the first groove 11 are open. The cross-section of each second groove 21 is semicircular, and the second groove 21 penetrates the jaw clutch disc 2.

[0059] During the torque transmission process, as Figure 8 shown, the rotation of the input shaft 1 drives two balls 4. A point contact is formed between the first groove 11 and the two balls 4. The outer peripheral walls of the two balls 4 at the lower left form a point-to-surface abutting form with the groove wall of the first groove 11. The connection line of the two contact points on the first groove 11 is parallel to the axis of the input shaft; the two balls 4 further drive the jaw disc 2 to rotate. A point contact is formed between the two balls 4 and the second groove 21. The outer peripheral walls of the two balls 4 at the upper right form a point-to-surface abutting form with the groove wall of the second groove 21. The connection line of the two contact points on the second groove 21 is parallel to the axis of the input shaft. Torque is transmitted through point contact, and compared with the spline drive in the prior art, the contact area is smaller, fundamentally reducing the generation of noise.

[0060] A first limiting member 211 is provided at the center of each second groove 21. Grooves that fit the contour of the balls 4 are provided on both sides of the first limiting member 211. Two balls 4 are provided in each second groove 21 and are respectively arranged on both sides of the first limiting member 211; a clamping groove is provided on each of the two end faces of the jaw disc 2, and a second snap spring 22 is embedded in each clamping groove. The two second snap springs 22 are embedded on the surface of the jaw disc 2 and are both located at the opening of the second groove 21.

[0061] When installing the jaw disc 2, the jaw disc 2 is sleeved on the input shaft 1 so that the three second grooves 21 and the three first grooves 11 correspond one by one. A ball 4 is placed from the left and right sides of each installation groove respectively, and then the two second snap springs 22 are embedded on the jaw disc 2 to complete the installation of the ball 4 transmission member 9.

[0062] In this embodiment, by using the balls 4 as the transmission member 9 and opening the first groove 11 and the second groove 21, it is convenient to assemble the balls 4, and the rolling characteristics of the balls 4 can further reduce the sliding friction resistance during the operation of the jaw disc 2, reducing the risk of jamming. The second snap springs 22 are embedded on both sides of the jaw disc 2 to limit the balls 4, improving the operation stability.

[0063] Embodiment 3

[0064] Further, on the basis of the above embodiment, as Figure 5 shown, slightly different is that the transmission member 9 is composed of two balls 4 arranged axially along the input shaft 1. The outer peripheral wall of the ball 4 is in clearance fit with the inner wall of the installation groove. The cross-section of each first groove 11 is semi-circular, and both ends of the first groove 11 are open; two ball socket grooves 212 are provided on the inner wall of the bottom of each second groove 21. The radial outer sides of each ball 4 enter the ball socket grooves 212. During operation, the balls 4 are axially limited through the ball socket grooves 212 to prevent the balls 4 from detaching.

[0065] During the torque transmission process, the input shaft 1 rotates to drive two balls 4. A point contact is formed between the first groove 11 and the two balls 4. A point and surface abutment form is formed between the radial inner sides of the two balls 4 and the groove wall of the first groove 11. The connection line of the two contact points on the first groove 11 is parallel to the axis of the input shaft; the two balls 4 further drive the jaw disc 2 to rotate. A point contact is formed between the two balls 4 and the ball socket groove 212. A point and surface abutment form is formed between the radial outer sides of the two balls 4 and the groove wall of the ball socket groove 212. The connection line of the two contact points on the ball socket groove 212 is parallel to the axis of the input shaft. Torque is transmitted through point contact, and compared with the spline drive in the prior art, the contact area is smaller, fundamentally reducing the generation of noise.

[0066] When installing the jaw disc 2, place the input shaft 1 vertically, put the jaw disc 2 on the top of the input shaft 1, so that the three second grooves 21 and the three first grooves 11 correspond one by one. Install the three balls 4 in the installation grooves respectively, so that the three balls 4 are respectively embedded in the ball socket grooves 212 located below the corresponding second grooves 21. Move the jaw disc 2 downward to limit the three balls 4 through the input shaft 1 and the jaw disc 2. Then embed the other three balls 4 into the ball socket grooves 212 located above the second grooves 21, and put the jaw disc 2 on downward to complete the installation of the ball 4 transmission member 9.

[0067] In this embodiment, the ball 4 is used as the transmission member 9, and the radial outer side of the ball 4 is arranged in the ball socket groove 212 to realize the axial limit of the ball 4 relative to the jaw disc 2. Moreover, the rolling characteristics of the ball 4 can further reduce the sliding friction resistance during the operation of the jaw disc 2 and reduce the risk of jamming.

[0068] Embodiment 4

[0069] Further, on the basis of the above embodiment, as Figure 6 shown, slightly different is that the transmission member 9 is composed of two balls 4 arranged axially along the input shaft 1. The outer peripheral wall of the ball 4 is in clearance fit with the inner wall of the installation groove. The cross-section of each first groove 11 is semicircular, and both ends of the first groove 11 are open; the cross-section of each second groove 21 is semicircular, and both ends of the second groove 21 are closed. During operation, the closed ends of the second groove 21 limit the ball 4 axially to prevent the ball 4 from disengaging.

[0070] During the torque transmission process, as Figure 8As shown in the figure, when the input shaft 1 rotates, it drives two ball bearings 4. A point contact is formed between the first groove 11 and the two ball bearings 4. The outer peripheral walls of the two ball bearings 4 at the lower left form a point-and-surface abutting form with the groove wall of the first groove 11. The connecting line of the two contact points on the first groove 11 is parallel to the axis of the input shaft; the two ball bearings 4 further drive the jaw plate 2 to rotate. A point contact is formed between the two ball bearings 4 and the second groove 21. The outer peripheral walls of the two ball bearings 4 at the upper right form a point-and-surface abutting form with the groove wall of the second groove 21. The connecting line of the two contact points on the second groove 21 is parallel to the axis of the input shaft. Torque is transmitted through point contact, and the contact area is smaller than that of the spline drive in the prior art, fundamentally reducing the generation of noise.

[0071] When installing the jaw plate 2, place the input shaft 1 vertically, slip the jaw plate 2 over the top of the input shaft 1 so that the three second grooves 21 and the three first grooves 11 correspond one by one. Install the three ball bearings 4 in the installation grooves respectively, place the three ball bearings 4 into the corresponding installation grooves respectively, move the jaw plate 2 downward, limit the three ball bearings 4 by the input shaft 1 and the jaw plate 2, and then place the other three ball bearings 4 into the corresponding installation grooves respectively, and slip the jaw plate 2 downward to complete the installation of the ball bearing 4 transmission member 9.

[0072] In this embodiment, the ball bearing 4 is used as the transmission member 9, and both ends of the second groove 21 are closed to limit the ball bearing 4 to prevent it from detaching. Moreover, the rolling characteristics of the ball bearing 4 can further reduce the sliding friction resistance during the operation of the jaw plate 2 and reduce the risk of jamming.

[0073] Embodiment 5

[0074] Further, on the basis of the above embodiment, as Figure 7 shown, slightly different, the transmission member 9 is a pin shaft 3, and a tapered pin is used. The cross-sectional shape of the first groove 11 is semi-circular, the inner wall of the second groove 21 is a tapered groove suitable for inserting the tapered pin, and there is a clearance fit between the outer peripheral wall of the tapered pin and the inner wall of the installation groove.

[0075] During the torque transmission process, the input shaft 1 rotates to drive the tapered pin. A line contact is formed between the first groove 11 and the tapered pin. One side of the outer peripheral wall on the radial inner side of the tapered pin abuts against the first groove 11, and the contact line is parallel to the axis of the input shaft; the tapered pin further drives the jaw plate 2 to rotate. A line contact is formed between the tapered pin and the second groove 21. One side of the outer peripheral wall on the radial outer side of the tapered pin abuts against the second groove 21; the contact line on the first groove 11 and the contact line on the second groove 21 are symmetrically arranged with respect to the tapered pin. Torque is transmitted through line contact, and the contact area is smaller than that of the spline drive in the prior art, fundamentally reducing the generation of noise.

[0076] When installing the jaw clutch plate 2, slip the jaw clutch plate 2 onto the input shaft 1 so that the three second grooves 21 and the three first grooves 11 are in one-to-one correspondence. Then insert three tapered pins into the installation grooves formed by the mating of the first grooves 11 and the second grooves 21.

[0077] In this embodiment, a tapered pin is selected as the transmission component to improve the assembly stability between the jaw clutch plate and the input shaft. Moreover, the circumferential constraint of line contact reduces the contact area of the connection structure during torque transmission, effectively reducing the noise generated at the connection structure.

[0078] It should be noted that the above sequence of embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the above specific embodiments of this specification have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0079] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

[0080] This specification and the drawings are only exemplary descriptions of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications.

Claims

1. An electromagnetic clutch engagement structure with a new connection method, characterized in that: It includes an input shaft (1), a jaw clutch plate (2) sleeved on the input shaft (1), and a plurality of transmission members for transmitting torque between the input shaft (1) and the jaw clutch plate (2); a plurality of first grooves (11) are circumferentially and spacedly arranged on the outer peripheral surface of the input shaft (1); a plurality of second grooves (21) adapted to cooperate with the first grooves (11) are circumferentially and spacedly arranged on the inner peripheral surface of the jaw clutch plate (2); each first groove (11) and the corresponding second groove (21) cooperate to form an installation groove suitable for installing the transmission member, and the transmission member is installed in the installation groove; the radially inner side of the transmission member is located in the first groove (11), so that the transmission member is in transmission cooperation with the input shaft (1), and the transmission member forms a line contact or a multi-point contact with the inner wall of the first groove (11); the radially outer side of the transmission member is located in the second groove (21), so that the transmission member is in transmission cooperation with the jaw clutch plate (2), and the transmission member forms a line contact or a multi-point contact with the inner wall of the second groove (21).

2. The electromagnetic clutch engagement structure with a new connection method according to claim 1, characterized in that, During the torque transmission process, the transmission member forms a line contact with both the first groove (11) and the second groove (21), and both lines are parallel to the axis of the input shaft (1); or the transmission member forms a multi-point contact with both the first groove (11) and the second groove (21), and all the contact points are located on two lines parallel to the axis of the input shaft (1).

3. The electromagnetic clutch engagement structure with a novel connection method according to claim 2, characterized in that, The transmission member is a pin shaft (3), the radially outer side of the pin shaft (3) forms a line contact with the inner wall of the second groove (21), and the radially inner side of the pin shaft (3) forms a line contact with the inner wall of the first groove (11).

4. The electromagnetic clutch engagement structure with a new connection method according to claim 3, characterized in that, Both ends of the first groove (11) are open, the second grooves (21) are all arranged through the jaw clutch plate (2), the pin shaft (3) is inserted and matched with the installation groove, and the input shaft (1) or the jaw clutch plate (2) axially limits the pin shaft (3).

5. The electromagnetic clutch engagement structure with a new connection method according to claim 2, characterized in that, The transmission member is composed of a plurality of balls (4), the plurality of balls (4) are axially arranged in the installation groove, the radially outer sides of the plurality of balls (4) all form point contacts with the inner wall of the second groove (21), and the plurality of contact points on the second groove (21) are all located on a straight line; the radially inner sides of the plurality of balls (4) all form point contacts with the inner wall of the first groove (11), and the plurality of contact points on the first groove (11) are all located on another straight line.

6. The electromagnetic clutch engagement structure with a novel connection method according to claim 5, characterized in that, Both ends of the first groove (11) are open, the second grooves (21) are all arranged through the jaw clutch plate (2), and the input shaft (1) or the jaw clutch plate (2) axially limits the plurality of balls (4).

7. An electromagnetic clutch engaging structure with a new connection method according to claim 3 or 5, characterized in that, Both the first groove (11) and the second groove (21) extend along the axial direction of the input shaft (1), and in the radial direction, the cross-sections of the first groove (11) and the second groove (21) are both arc-shaped.

8. An electromagnetic clutch engagement structure with a new connection method according to claim 7, characterized in that, In the radial direction, the cross-sections of the first groove (11) and the second groove (21) are symmetrically arranged.

9. The electromagnetic clutch engagement structure with a new connection method according to claim 2, characterized in that, The transmission member is axially movably matched with the first groove (11), and the transmission member is axially movably matched with the second groove (21).

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